In the analysis of EH things are changed by allowing gravity to interact with a quantum system. They consider two possibilities: either (a) the interaction will collapse the wavefunction, or (b) the interaction will not collapse the wavefunction. Before continuing, it is worthwhile to note that EH must proceed like this, by classifying modes of collapse, because they do not have a proper model of collapse themselves. This turns out to be problematic, first because ED is just such a theory that it does not fall into either of the categories laid out by EH, and thus evades their conclusions. But second, Albers et al [1]} make the point that if the interaction does, in fact, collapse the wavefunction, corresponding to option (a), then the details of that interaction will be important in examining the behavior of the system. But there have been many attempts in recent years to model the collapse of the quantum state due to gravity, with varying degrees of success. (For recent reviews of the subject, see e.g., [2]}[3]}.) So long as such models are actively being improved, and not experimentally ruled out, the arguments by EH cannot be conclusive on this front.
